package com.tcy.bigevent.interceptors;
/**
 * 登录拦截器
 */
import com.tcy.bigevent.utils.JwtUtil;
import com.tcy.bigevent.utils.ThreadLocalUtil;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import java.util.Map;

@Component
public class LoginInterceptor implements HandlerInterceptor {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //令牌验证
        String token = request.getHeader("Authorization");

        try{
            //从redis获取token
            String redisToken = stringRedisTemplate.opsForValue().get(token);
            if(redisToken == null){
                //token已经失效了
                throw new RuntimeException();
            }
            Map<String, Object> claims = JwtUtil.parseToken(token);
            //把业务数据存储到ThreaLocal中
            ThreadLocalUtil.set(claims);

            //放行
            return token.equals(redisToken);
        } catch (Exception e){
            //http响应状态码为401
            response.setStatus(401);
            //不放行
            return false;
        }
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //清空ThreadLocal中的数据
        ThreadLocalUtil.remove();
    }
}
